Quoted from monkeyboypaul:
i think it's hitting 3 lit shots in rapid succession, or before the Lightcycle inserts reset again.
We call that a combo
LC is all about combos. Don't hit them fast enough, and you start again. As I understood it, there was a 3 shot combo that if you could hit it, would light it solid. But I could never hit it. LC was always my nemesis.